I have a North Face vest that I wear that is pretty light weight as I do a lot of outdoor activity, but as well, wear into the office, it's the North Face Wndwall. I'm not sure how warm it gets in the summer time for you, but even in 70 degree weather, the vest gets too warm for me and I'm back to just the pant pockets.

Getting a belt holster for your cell phone will save you a lot of space in your normal pant packets, you'll be amazed how much space a cell phone can actually take up. As mentioned above, cargo pants give you more pocket space down by your knees instead at you side pockets. I also have a few pants that have interior pockets/compartments in the side pockets that help me segregate things.

Other than getting a waist bag, utility belt or shoulder sling bag, reducing is usually my best option for me.

I can not think of the name of it, but your question reminded me of my trips to other countries where I wanted to protect my things and not have them in a pocket or wallet.
I bought a leather pouch that was worn around the waist and had two pouches inside and a zipper lock on the outside.

I also found a shoulder strap that is worn under a shirt to protect driver's license, passport, cash. This would not work for a cell phone.

Another place I hid cash was in my sock, just slipped it down into my sock on the side above the ankle.

I see no reason why the waist pouch would not be fine for keys, phone and you can jog in it because did.

I recently saw something like what you're wanting at a flea market. A woman had taken old jeans, cut the legs off, and made something that resembled a bandoleer / sash. It was about 4" wide, and had several pockets sewn on to it. She was wearing one with her workout sweats. She had keys, wallet, phone, etc., all in the pockets sewn in. I'd think a seamstress or tailor should be able to whip you up a few in a few minutes, in several different colors and fabrics. Or, you could have a leathersmith put one together for you.

Featured Post

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

Phishing is at the top of most security top 10 efforts you should be pursuing in 2016 and beyond. If you don't have phishing incorporated into your Security Awareness Program yet, now is the time. Phishers, and the scams they use, are only going to …

The Bounty Board allows you to request an article or video on any technical topic, or fulfill a bounty request to earn points. Watch this video to learn how to use the Bounty Board to get the content you want, earn points, and browse submitted bount…

Notifications on Experts Exchange help you keep track of your activity and updates in one place. Watch this video to learn how to use them on the site to quickly access the content that matters to you.